Looks like the new GFX card line from Nvidia is gonna be called 20xx and the 2070/2080 will be RTX indted of GTX, because of Raytracing. Only the RTX 2070/2080 will have Raytracing. The 2060/2050 will be called GTX because of no Raytracing.
Looking at the specs we are looking at a 50% increase from GTX 1080 to RTX 2080 and the RTX 2070 40% increase from GTX 1070
The prices looks to be okay
nvidia registers turing geforce RTX and quadro RTX trademarks